===========================================================================
NAME    
        pdb2img - generate a block representation image from a PDB file
SYNOPSIS
        pdb2img [OPTION] [-s=factor] PDBFILE OUTFILE
DESCRIPTION
        generate a block representation of base or peptide bond in PS, XFIG
        or Raster3D format. The six faces of each block can also be shown in
        different styles, resulting in much more revealing presentation than
        an atomic model. With Raster3D input, these blocks can be combined
        with other schematic representations (e.g., from MolScript)
        -f      generate an XFIG file
        -r      generate an input to render of Raster3D
        -n      without header for Raster3D (with -r)
        -p      block representation for peptide bond
        -c      color image
        -i      identical style for the 6 faces of each block
        -u      up-down faces instead of minor/major groove faces
        -m      minor groove plus identical 5 other sides
        -s=factor  set scale factor (to put image in the same scale)
        -b      draw a boundary frame around image
        -h      this help message (any non-recognized options will do)
INPUT
        PDB file
        One-letter options can be in either case, any order and combined
EXAMPLES
        pdb2img -bcu sample.pdb sample.ps
        pdb2img -fc sample.pdb sample.fig
        pdb2img -rc sample.pdb stdout | render -jpeg > sample.jpg
OUTPUT          
        PS, XFIG or Raster3D input file
        bblk_lkg.alc, pblk_lkg.alc
SEE ALSO
        r3d_atom, alc2img, stack2img, blocview
AUTHOR
        Written by Xiang-Jun Lu at Wilma K. Olson Laboratory at Rutgers
        Check URL: http://rutchem.rutgers.edu/~xiangjun/3DNA/
        Report bugs to <xiangjun@rutchem.rutgers.edu>
===========================================================================